Whomever told you that you can only do it once or twice was probably referring to an engineered hardwood product (they have a thin layer of real wood over a thicker layer of particle board).If the floors are real hardwood all the way through then you can sand and refinish them many many times.If you're good about it, you can usually get away with a light screen/buff and re-coat instead of a full deep sanding.

I know in Michigan the state pays a couple families in my area to leave their land vacant to allow for animal habitat and growth. 

I'm not a big fan but many of my friends are.Smart Trust Deed Investment - George Coates.

I've recently become debt free with the exception of my primary residence ($93k owed on $120k value, 14 years left @2.75%) and I'm working on getting it paid off before I'm 40.I'm educated, opinionated, animated, and analytical so I'm not one to jump into something new without understanding it and evaluating all my options.

Prime all exposed wood surfaces and apply two coats of paint on all previously painted surfaces $ 2,850.004) Install rear exterior door unit with all hardware and locks.$ 570.005) Replace concrete pad at the base of rear stoop steps$ 720.006) Remove the dead tree at the right rear corner of the house, haul limbs away and stump the roots

One large animal or a few small animals would have about 1/4 - 2/3 of an acre.

We are concerned with them being two young guys that they will turn our house into a party/animal house creating a lot of noise and damaging our property.

That makes a ton more sense; PM or HM.This IS a place to get help, but I'm not a kid-glove, or sugar-coating kind of guy.The points raised and information I relayed are all legitimate points, which will be helpful to you.

FHA > Multi > Refi > Repeat 3) What is your favorite animal?

Ideas on how to get that unit under control or at least sealed back up from the outside to keep weather and animals out....make necessary repairs for now on the unit I intend to buy to make it rentable etc.This is by far the biggest and most complicated rehab job I have ever come into.