You can easily do this for free.

I can ask for the world, can’t I?

It can be a long process over time with multiple dynamics you have to be on top of consistently.

The withholding can also be stopped altogether, and only actual taxes owed will be collected by filing form MW506NRS at least 21 days prior to settlement and filing it with the Comptroller of Marylands office to get the exact actual tax owed calculated. 

There have been some very good spreadsheets posted on here in the past that you can search for and find.A spreadsheet is going to be much easier to use and play with different numbers than an app.

Good luck on your Real Estate journey.

Learn the area, meet other investors at meet-ups and one-on-one conversations, and once you feel more confident, you can make a purchase to live in. 

Maybe you can find someone local that would work 4-5 hours one day a week?

If you're househacking, Conventional is likely the best option for you and will only require 5% down on multifamily.

Quote from @Matthew Becker: It seems like you can cover it so just do it.