If you need to install central air or replace a furnace that is going to cost a few thousand dollars.

Doing some work in the attic to shore up air leaks would help.

@Dan GustavsonI’d also Rent out the RV as an air bnb and then kick the dog out of his house and rent it as a mother in law suite ,throw out the Christmas crap in your attic and rent it to college students , convert your sons tree house to a sober living for men home .

When I am living in the new build I plan to do Air bnb, so I am not sharing a space with my tenant.

Here recently though, I have been listening to a lot of podcasts and reading a lot of info on using them as air bnb.

Natural light enters the home through a new skylight and solar tubes in each bathroom.

Sounds like a fun property though I would love to have a ranch with my own private lake stocked with nice Kamloops Rainbows :) and an air strip of course..  

You could also do something like an Air Bnb in Flagstaff area. 

New walls, new paint, new windows, new appliances, floors, new electrical, new plumbing, ceilings, possibly the roof, air conditioning, water heater, etc.You might be tempted to say: "I am not sure that it will need all of that".

In NC, we have subterranean termites, which come out of the ground, create tubes, and crawl up wood structures, eating them along the way.