We don’t know anyone in the area, but you might want to read our series about “How to Screen a PMC Better than a Tenant”, since selecting the wrong PMC is usually more harmful than selecting a bad tenant: https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesAdditionally, don't treat property management like a commodity and just focus on the lowest price!

We don’t know anyone in the area, but you might want to read our series about “How to Screen a PMC Better than a Tenant”, since selecting the wrong PMC is usually more harmful than selecting a bad tenant: https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesAdditionally, don't treat property management like a commodity and just focus on the lowest price!

You can also find MS Excel templates that will do amortization calculations for you. 

Think long term with massive goals and when you end up with anything less you will still likely be in excellent shape.5.

I also have a little experience and understanding analyzing deals using Excel from school classes but would definitely want to learn more about that!

It is in a great part of town and also has an excellent school zone.

This is a great BP blog post about analyzing for STR:https://www.biggerpockets.com/...It even includes an excel calculator that is pretty good.

Looking for a General construction contractor in the area with excellent track records with similar projects. 

Not too late - when you sign the Loan Estimate is when you've formally engaged and selected the lender so before that you're fine.

While qualifying for a HELOC is dependent on your home equity and your credit score, good or excellent credit makes it easier to qualify.