I agree with @Chris Seveney that Del Ray would be an excellent place to do this.

I’m not sure which one is the most realistic.BP Rental Property Calculator Rental Calculator: https://www.calculator.net/rental-property-calculator.htmlWealth Optimizer: https://www.rpmengage.com/wealth-optimizer Zillow: https://www.zillow.com/rental-manager/resources/rental-prope...In addition to the ones listed above, I’ve also downloaded Excel spreadsheets from a couple of other sources.

Even though I am up around $700k, I would have passed on this purchase and found different candidate property if I knew it would cause an issue. 

Rent Auto Draft works great, it takes 7 days to hit my bank but I am ok with that (you can pay premium for faster processing if needed).I like the all-in-one solution from property marketing, to candidate background checks, to rent payment, to maintenance request and more !

Personally a cash-out refi could help me get more quickly into all-cash BRRRs or a REI venture in Spain, however I don't know to what extent this is at the expense of rental cash flows, and what is the wiser decision long term.I've combed through posts online and looked for Excel templates to run some calcs and get a sense, but nothing really filled the void... 

However, I would write down in an excel sheet all of them and process that go into a rehab and do a estimation column and write-down those numbers. 

and it's not that anywhere is "saturated," it's that prices AND rates are high.or as @Travis Timmons said - a creative niche that you excel in will cashflow. 

There may be some excellent opportunities there.

Additionally, the area's median home prices and rental rates continue to rise, offering investors excellent opportunities for long-term returns.

That being said, if you’re exploring the BRRRR method, a DSCR loan could be an excellent fit for your goals.