Robert welcome to the forum. I too am new in the slow engine field. I was brought up on a farm so I do have practical experience with diesel and gas engines. In the last 4 or 5 years towns in a hundred mile area of us have had black outs for some reason or another. Ice, tornado's and storms. I decided that our town was either lucky or our time is coming. I started looking for something for backup when it hit. I looked at numerous 3600 RPM machines and even thought about a 10,000 wat welder. Then I saw an ad for a lister 24/2 with a 15 k head on it.
Well when I was talking with the head of our maintance department and he said that would not be big enough to supply the house if we really needed it. Just FYI I work in the medical field if you didnt notice the name. So I started looking for another head because I have a wife that is well into the 21 century. I picked up a 20 K head and then I had plans for the 15 K head. After all of this I found this wonderful forum that I just had to let everyone know what a good purchase I made.
Man the replies made me feel like I was dumber than dirt. So now I have a 24 hp engine and a 20 K head which I knew up front was to large but someday I hope to convert to wind power since our city is listed as the windest city in the uS. We have two large wind farms on both sides of us.So in the end I used the 15 K head which i had already planned to do and make a portable generator out of it and mounted my 180 wire feed welder and 225 am stick welder and a box for a 220 feed out to plug into a house if needed and run it with my 20 hp diesel garden tractor.
My stationary set will be mounted in a above ground storm shelter for two reasons. Cement makes a good sound barrier and it will also be where we can go if a toranado get close. Now all we have is looking out for one or becoming mobile if we need to to miss it. So with my stationary I will have enough power for myself without problems and I will be able to be a good neighbor and run BIG extension cords.
I noticed in you intro you stated you made all of your lumber you needed for your house. This tells me you must have some sort of a pioneering spirit. I would guess you must have included some sort of heat supply in your house other than what you will produce with a generator. Wood heat I would guess. You will probably have a few candles sitting around if needed. So the worst would be if the generator quit for a short time you could stay warm and have light with candles.
What Bob said is true since you will be off grid is to get something already running. I dont believe you will have to much problem with finding that. Its the preperation of getting it set up that might be the issue. I may be new but I realized very early these engines like good pads to set on. There is quite a bit of cotroversy about how much cement. I chose the solution that to much is not to much. It would be much harder to add more later. Another part of the plan that you need to think about is these engines need food. Now granted not as much as gas engines but you still have to feed them. How much fuel supply do you plan to have on hand? Remember that if for some reason where you get your supply from might be without power so you being off grid I would always have plenty of extra. You also have to change thier oil and minor other repairs. Then heaven forbid something major that might take a few days to fix.
Do you have any other form of power that could run a generator? if so you might think of getting a head and building a portable system then you have a backup for your stationary system. This saw mill you used. Is it an option for putting a generator head on it. There is a guy in Georgia and his son is in Las Vegas who sells ST heads and they are pretty reasonable.
There will be plenty of advice from this forum and some of it might seem negative. Like RAB said we have no idea of what you needs are and then what you wants are. These can be to completly different amounts. In my case I needed to plan for what my wifes needs were and she loves the 21 century. There is one guy up in your area in Washington or Oregon that you might want to steer clear from. He will sell you a bill of goods. You can probably figure it out when you get a price for his systems. I wont mention the name. Keep in touch I have my email listed and even though I am new I still have some knowledge. I may know more about health care so if you are out there in the woods and cant get to a doctor I might be you savior. I also have a fair amount of experience in welding and a little about engines. I depend on the forum for help there. Bob, Bill, Murph,Jens and the Oliver guy have been very helpful and if I havent said it lately "THANK YOU GUYS". Good luck, I would like to see your place sometime. I have a son in CA. Mike