I imagine there may be steps to take with the city upfront to determine if in fact the ground on the lot can be built on, but some general guidance or tips on best place to start and what to expect throughout the new construction process in Buffalo.

I guess it depends on your risk tolerance and your ability to find a better deal than the one you already have with the equity you are pulling out.

Who is vetting the buyers and calling the lenders to confirm financial ability?

It can be stressful without contractor connections, but the potential returns and ability to quickly grow a portfolio can make it worthwhile.

The way I see it, it would make more sense to do it in house once I've got a little more money to spend on equipment and the ability to mail to a lot more addresses without missing a ton of calls from motivated sellers.Account Closed Thats low compared to some of the big name services!

Biggest thing IMO is getting close to the train station and have a high quality units that may not look attractive on paper the first few years but will have the ability to raise rents consistently long term. 

. - What systems/software do you recommend to use to determine the markets to invest/buy into?

Only then will you truly be able to determine what you should do with your equity. 

Had the ability, experience, and knowledge to succeed4.

I wasn't aware that you have the ability to PM yourself.