I’m weighing two options for our housing situation and would greatly appreciate your advice, given the complexities involved.1.Renovate and Buy Another Property•Invest to renovate our current home adding a bedroom to the house given our family outgrew the house.

What methods do other private money lenders use to pass along servicing fees to the investors involved?

Worked out nicely for all involved. 

Ourcurrent approach involves identifying possible contact information for thelisted owners and calling multiple numbers, but this process is time-consumingand yields limited results.

Two flats are essentially just houses.... they trade like houses and there is a lot of emotion involved.

These leads were very unresponsive and may pan out over a longer period of time but the time involved is just not worth the effort.  

I recommend reviewing your local laws to understand the requirements involved.

I've seen it with my own eyes, my real estate ventures have hit the jackpot thanks to these tactics.Now, let's dive into boosting that revenue through clever fees and rebranding.Charging appropriate fees during the application and move-in process is essential.

You mention not a fan of landlording, great, the bank never get's involved in that stuff right. 

Investing close to home allows you to gain hands-on experience, learn the ropes, and be more involved in the day-to-day.