I run a large Real Estate Agent team and have started to invest in supplemental companies in order to increase income through the same activities.

I'd recommend connecting with others in your market - investors (new and experienced), lenders, Realtors, friends/family who are on the same page as you, etc.This way, you can supplement your research findings with what others know.

Most start with mailers then supplement cold calling with mailers.

I’m wondering if this camera supplements or compliments your typical professional photographer.

Take a little more from “business income” and use the passive income to supplement...

I'm working with a ton of homebuyers that are focusing on getting single-family homes with a mother-in-law apartment to help supplement the mortgage payment. 

Sometimes wells have reduced flow in the winter due to water table fluctuations if its a shallow well, so you may only need to supplement with an occasional water delivery.

Try different meetups and set a goal for how many you'd like to attend each month/quarter.Lastly, if you could supplement your direct mail efforts with cold calling those same leads, you'll have a better chance of conversion.

" methodology and started looking for other sources to help supplement the extra I needed to bring me a down payment I liked.

If your goal is to buy a nice vacation home and enjoy some supplemental income I suppose you can do whatever you'd like, but STR investments carry plenty of extra risk and upkeep.