If it's just a numbers question, and the numbers are accurate, buying at $46K, rehabbing at $25K, and selling at $105K works as long as there are no unforeseen additional costs outside of the ordinary.I'm skeptical based on the photos that that's a $25K job.

How do you think we've been able to obtain millions in loans on non-performing multi-family and both of us don't have a job?

There point if valid but not accurate due to no construction to the stair in this case. 

If you could perform the BRRR strategy, factoring in ALL EXPENSES.  

Research your tax rate to get an accurate idea!

Owner financing doesn't make this a deal, it just sets you up for foreclosure when you can't refi, based on the Real performance of the properties, 2-3 years down the line.

I am specifically looking at 3 and 4 unit buildings, and I don't know how to accurately estimate these costs.  

I have one right now here in Oregon we actually had to sue for performance we gave a huge deposit which the lady kept and spent and then she would not sign the deed I have had 6 figures sitting in escrow ready to close since last May..

Perhaps you might cull the worst performers from your portfolio and replace them with better performing properties.Just some ideas.

A natural person, a corporation through its officers, a partnership through its partners or a limited liability company through its members or managers that deals in selling, exchanging, purchasing, renting, leasing, managing or pledging the person's or entity's own property, including cemetery property and membership camping contracts, and that does not receive special compensation for a sales transaction or does not receive special compensation or other consideration including property management fees or consulting fees for any property management services performed, if the majority of an officer's, partner's, member's or manager's activities do not involve the acts of a real estate broker, cemetery broker or membership camping broker as defined in section 32-2101.Turns out my colleague got bad information from a local lawyer.