I should have removed that from my post.Second, rentals are hard to find, which is exactly why he should charge market rates!

I was mainly thinking about the effects of putting an entire strong cashflow back into the mortgage.

If the appraisal came in lower then what was being using originally that could effect the rate/terms.

Removing a wall could add value to the home in theory, but for some rental areas, having extra rooms helps.

It's a type of house hacking that's very effective to get your foot into the real estate investing door. 

Avoidable and more cost effective if using a broker you like. 

Used correctly it will help remove all sorts of stains.

Certainly not afraid of it -- the government red tape is Partly a question and difficulty removing a bad tenant is probably he biggest downside - that goes for any property though.   

Often electric baseboard is most cost effective.

While debt can be a powerful tool in real estate, over-leveraging can increase risks, especially in volatile markets.This strategy, when executed well, can be an effective way to build wealth through real estate.