This implies there is no way I add solar to a flip unless there is no utility provided power.  

Usually this implies the property is either overpriced for the location or needs a lot of both (or usually both).

The nature of your question implies the former.If that is the case, then just focus on leveraging the "live in the past 2 of 5 years" rule for capital gains tax avoidance. 

This implies that the addition will result in an initial negative position.  

Search YouTube for subject to, lease option trainer's.

This implies your rent can be kept near market rent.  

However, all indicators imply the entire Boise metro area will continue to be in high demand due to people being able to work more remotely now and enjoy our quality of life (hiking, biking, skiing, hunting, fishing, white water rafting, golfing, etc.). 

As was implied, hook up with a mortgage broker that can tell you your options as well as what you can qualify for.  

You probably don't need a personal trainer.

Cap rate for class b of 4.4 (metro)to 4.7 (suburbs) implies with financing negative cash flow.