Contact a couple contractors to see what the cost would be to add the addition.

Are there additional factors you think are worth considering?

You may have to make modifications or additions in order to get that signed off.

Planning to start a complete home remodel (interior/exterior) on a home (currently 837 sq ft), kitchen and bathroom bump out, and add an additional bathroom. 

He may have to eat those additional expenses if he can't prove he had approval prior to doing it.c.

Additionally, it drives people away from the forums. 

Sometimes they don’t like that because you don’t have skin in the game.As for advantages to the seller - are you going to pay them more for the property, that would be a perk that I offer in addition to making a little extra on interest for the duration of the loan.

This combined with my new boss giving me additional responsibilities (how dare he...) and the support of my wife prompted me to take the plunge. 

Here are a few additional ideas that have worked for me and others in competitive markets like Austin:Off-Market Leads from Contractors: I had a friend who rehabbed a house in North Austin last year.

Recently completed a cash-out refi and want to take that money and buy 2 additional properties (~$200k or less each).