I learned this the hard way personally and had to get mine repaired.

Also, the amount of damage was so expensive to repair that he simply could not afford to fix the more damaged units.

Every deal is different, and every person is looking for different marginsAfter Repair Value (ARV) - Rehab Costs - Purchase Price - Fees (holding costs, closing costs, selling fees) = Net Profit (before taxes).Are you ok with the net profit based on how long it's gonna take from start to closing? 

Even in the nice locations, most top out around $2,800.Of course there is also your increased insurance, vacancy, repairs, CapEx, and the never mentioned reduced rent on the main house since having a stranger living in your backyard usually isn't appealing to most renters. 

It usually starts with a thorough walkthrough of the property to list all repairs and improvements.  

My gross income is a bit less than $7k (and I'm renting near top of market rates) with minimal repairs ($2k/y), but...1.

Have you assessed how some of the repairs will be funded? 

,Buying, renovating, and selling is a great strategy, but here are a few things to consider:Start with the Numbers: Make sure you know your ARV (After Repair Value) and work backward to calculate your budget, including purchase, renovation, holding, and selling costs.Financing Blindspots: Even if you’re buying in cash, plan for potential delays or overruns in renovation costs.

Prioritizing cash flow, mastering property management, and learning basic repairs can make a big difference.

Will they have trouble making the payments to you while also having enough money to keep up with the maintenance and repairs/ tenant issues/ all the expenses involved with owning the property?