What you can borrow depends on the strength of the deal and your qualifications as a buyer.

@Sam TrightBesides the other comments above you also start really walking or crossing the fine line of selling securities when you start bundling up parts of a note and selling it to different people.

It's not really about the area, it's about the spread on that deal.

Are you hiring a GC or planning to GC on your own? 

These can be fairly automated for you as well to help save you 10% which on 2 units could be well worth it. 

If you are renovating your rentals you need to let the current insurance company know what is going on, if they send an inspector out there within the time you could get kicked from the policy too, and not easy to get back on one.

Quote from @April Birdsong: I will be closing on my 1st STR/MTR this month. 

It was listed on the MLS and was right down the road from us.

These are the keywords that stand out to me in your question:sources, websites, best deals, systems, step by step, factors.You are focused on all of the wrong things.

Congrats on your experience and welcome to the forums!