No sub will be effective via email in the field, it's just too hard to be out on site and answer emails from you iPhone.

However I fail to see how this is true at the scale at which I would be capable of buying...in my price range the properties would not be large enough to merit their own on-site Management, unless maybe I just bought one and bet my entire future on it.

A lot of great information on this site to get you started.

This site is a gold mine of knowledge, some of the experts that chime in regularly have many decades of Real Estate Investment experience and happily help new people. 

Its my first time using bigger pockets so still not sure how to use the site.

Here is a site Ive started using recently.

@Susan Chan Most of the turnaround projects I've heard about involve one of the partners overseeing the management at the site.

BP is a site dedicate to RE investing and wealth building. 

You have to be careful because most of the time the deposit will not be refundable and most if not all of the properties you have to bid on site unseen.

I have seen the property and there does not seem to be any large repairs at first site.