I can probably teach it, but I won't be spending that kind of money for the platform and I doubt people who wants to learn are willing to pay for the platform and tutoring fees. 

Haven't been there, but pay attention to the foundation - if the floors are level there no action needed.

I understand you don't need a lot of space, but you are paying someone else's mortgage.I would start with a fixer-upper investment, up to four units.

I think I've done my bookkeeping almost every way you can - from not at all -> keeping receipts in a shoebox and handing over the entire shoebox to my CPA -> running 10-key tapes on all the receipts for each category and handing those tapes to my CPA -> DIY Quickbooks -> paying a bookkeeper to manage everything in Quickbooks -> to now doing it myself using Baselane.

How to avoid BEFORE this happens: pay a day early, don't raise issues, get loans that aren't backed by US Government that the note states they don't sell the servicing.How to avoid the late payment- pay all accounts from the same bank account on the same day of the month.

If I pay down $50K, how can I calculate the new monthly payment?

The management company stopped sending statements and stopped paying me rent at some point. 

Buy in the winter, and you'll pay less money for the property, but have to deal with longer vacancy.Buy in the Spring and you'll pay a lot more money for the property, but you can fill a vacancy much quicker.Pick your poison.

My hope is to build a strong network of like minded investors and real estate professionals that share similar goals, values, and experiences to help achieve successful REI deals!

Heck, some people might even pay more for the 'cool factor' of living in a 'small home'....I'd give it a go since you're a veteran of this RE stuff.