Option 2) use extra funds at the end of the month into a principal payment for mortgage 2Option 3) invest extra funds in the stock marketOption 4) save extra funds in a high yield savings account and recast mortgage 1 so then the cash flow can become extra principal payments toward mortgage 2 or in savings to purchase another property.I don't know how to compute which is the better option, but would also like personal advice and other options I hadn't thought of.Thank you.

Use Airbnb and go look at top properties in your market, get the Google Adwords "Keyword Planner", Type in google searches on your computer and see what autofill suggestions come up, get on trip advisor and other similar sites to find out what's popular, etc. 

You have to log into the desktop version from your browser (not super mobile friendly) but gets the job done.

Some of my tenants don't have computers, so I am happy to compensate my property manager for going out to the tenant and helping them register their unemployment claims.

There are very low cost options and if you have a great credit score and lots of equity (think desktop underwriting) you might even get one at no cost.

I want an honest and communicative lender that doesn't have DTI or bank statement cash flow requirements, that will lend on ARV, desktop appraisal preferred, that will lend up to 100% for purchase and rehab, that has a simple and convenient construction draw method not involving physical inspections.

I think if you're trying to compare RE as an investment to alternatives (stock market, for example), you should compute and compare the ROE.

I'm barely on BP from my computer I always use this app on my phone.

This is a broad question, if you have a recommendation I'd love to hear why you like the specific computer.

With QBO, you can easily track your income and expenses, manage your rental properties, generate reports, and even collaborate with your accountant or bookkeeper.One of the things I love about QBO is its accessibility - you can access it from anywhere, anytime using your computer or mobile device.