We always try to remove them where the additional light from outside or ventilation isnt needed, when needed, we have replaced with glass block or nicer unit we built custom non functioning window out of pvc. 

(I know, I know, it's not sexy to talk appreciation, but that's where the big gains are when you hold long enough.)All that said, anything that gets you excited about real estate and gets you engaged is a good thing, so if this is the thing that lights your fire, go for it. 

I've done 5 flips solo and 2 additional with partners.

Additionally, I would be surprised if any lender would approve this set up.

I am looking at adding commercial industrial and additional residential to my portfolio we buy and hold.

You will need to network with them and get their information for each company.You can sign up for Investor Lift and gain access to their network of buyers, and then start marketing to them directly.

The basic "hits" can be seen here: https://singlefamily.fanniemae...When the "adverse market fee" was in effect, it was in addition to those things at the link above.

I agree with BillB. in addition to, you must include in your new lease a requirement for additional tenants.

Additionally, providing space for home-based businesses or shared offices may appeal to those needing occasional in-person meetings.

I think most of us legit lenders are going to take LTC into consideration in addition to ARV.