If you wanted a root canal, would you go to the dentist that has worked in the field full-time for ten years, or would you pick the cheaper dentist that does it as a side hustle?

Start by learning the real estate basics, study the market, set your goals, get a team of experts, make friends in the field, look into how to pay for it, begin small then grow, do deep checks, and go for it.

In my local MLS, it may not be true in your area, there is a field that a listing agent can fill out to designate the home they are selling has a FHA, VA or USDA loan which by default would make it assumable.You can also reach out to your favorite local title company and ask if they can provide you with a search tool like TitlePro247 or provide you with a list of current on the market homes with a FHA, VA or USDA loan in place. 

Record or livestream your wheat fields, a babbling brook on your property, an anthill, a beehive.

It has been my side hustle during my military career. 

Fortunately, I had recently started a new job in an essential field, which provided a minimum wage income.

as we certainly could use it as Females forging ahead in this Exciting predominantly male dominated field...

Might need a septic tank and leech field put in if you are building.  

Sure, if you are a house flipper you have a buy box, but formulas and calculators are the one thing holding back new investors right now because they spend all of their time plugging in numbers from the internet into a program on the internet instead of getting reps in the field and learning what the different basements smell like between 200k and 300k.

Zillow's API is no longer offered (or they make it extremely hard to access these days - have had no luck finding an updated link/page for it), Redfin has broad-stroke CSVs you can download that only give 5-10 fields of info and not often at the metro area, you can't legally create a tool to crawl these websites...I'm looking for 1 (or a handful of sources) to pull together basic metrics at the metro/city level for US real estate.