I would budget maybe 20-30k depending on how far you are going down.

Also, rezoning from RS-3 to RM4.5 is like a .0001% chance and depending on your ward some alderman refuse to consider spot zoning no matter what

Essentially it's totally dependent on the terms/risks that the buyer and seller are comfortable with and everyone understands the transaction. 

It depends on what area you're located in RL is good on A/B class SFR.

As you begin your REI journey here is one tip I have for you:Use this website as you are trying to narrow down the places you want to invest in. https://www.areavibes.com/Its awesome because it gives you a "total livability score" & you can compare different zip codes & streets to others. 

Definitely a lot of good opportunities depending on which neighborhoods you're looking to invest in and the type of properties you're looking for. 

Just depends on the area. 

I'm going to say it depends on what your intended use is for the space.

It didnt affect the loan because of the divorce decree, but it completely wrecked the borrower's credit score - dropped it 130 points from high 700s to mid 600s- because the mortgage still reports on his credit report and was showing as a mortgage late. 

I am cutting out 2or3 middle-men; a sales rep, a GC, maybe a sub-GC because yes there can be layers of GC's depending on who your hiring.