My thoughts are complicated Darrel. Just a heads up.
If you plan on living there for the rest of your life, the money doesn't matter.
If you plan on selling it eventually, do a cost/benefit analysis. Supplies and labor vs. how much more the house will be worth when it's done. If those two cancel each other out, you wasted time and money.
The location plays into it as well. If this farmhouse is in an area where other structures are deteriorating, you won't be doing the area any favors. Your increase in value will make you a real estate comparable that will increase the value of other homes in the area when they don't deserve an increase. This also means an increase in property taxes which your neighbors, I'm sure, won't appreciate too much.
If you want a "mansion in the ghetto" so to speak, buy the White House.
I gave you fair warning Darrel.