I might sell some units as well. 

And yes, the income from renting is still taxable, but ideally you are offsetting a chunk of that with depreciation which is a non-cash expense.You should read Amanda Han and Matt MacFarland's books as well which are available in the BP Bookstore. https://store.biggerpockets.com/products/tax-strategies-book...

We have sold (tax free), kept as long term and/or short term rentals as well.

Dave NA ,Non LLC and non corporation husband-wife holders of rental properties do not have to file a partnership return; They can file Schedule E.The problems comes if it is held by an LLC(Two-member) in a non-community property state.For the management activities I would still recommend using an S-election or C-corp if applicable.

Quote from @Chase  I hope all is well!

So you can see why mentioning that solar benefits from tax credits without including the fact that every other form of energy does as well comes across as remiss to anyone who knows a little bit about energy. 

Everyone I spoke with was knowledgeable and pleasant.

Our end goal is to be in a position where we can be very selective and choose the clients and properties we work with so that doesn't happen.

So I am assuming you were the lender on these properties and they did not manage them well and they went into foreclosure.

Not to say you cannot do well, but it’ll take some extra TLC.