With that said, installing a new bathroom or kitchen sink is increasingly expensive and on the coast (or any rural-ish location) contractors are notoriously unreliable..let's be honest, remodeling is always trouble.  

If you are doing a major remodel or substantial development this will quite often trigger the need for a properly sized system to be installed.

The market I’m in is great for renters (but the quality of renters can make you pay attention to their applications)  I’m rehabbing the 3rd house now, plan to remodel the 2nd house after I’m complete and then unsure if I should:-obtain traditional mortgage then should I cash out refi and find more property?

The REO is Fannie Mae, and they have paid to have the interior of the house remodeled before listing it.The current asking price is $280,000.

Often what has caused the most damage to a structure is past owners careless remodeling cutting notches holes or completely through structural members of the home.

The presented pics of the house were taken after remodeling in February-March 2021

I've bought fixer's before, remodeled then sold or kept as rentals but I'm not at all familiar with this "wholesale flipping" concept. 

I have been lucky enough to have a career flipping and remodeling homes.

I remodeled the bathroom and yard too.

Complete gut, redesign the layout and remodel.