Goal is to keep buying larger deals 40-100 units now.

What is your goal here in this market?

Happy to dial a call to someone who you think can help achieving this goal of mine if doable. 

The most common strategy is to use one company for list sourcing and then use a servicing company for direct mails.

I would be happy to connect and see where our goals could align. 

I mean you could call it a "kickback" but it is common practice.

Right, I wasn't clear enough.My main goal is to purchase properties in areas that I believe will develop in the future and the value of the properties will increase.In order to increase the cash flow (to cover current expenses) I am checking the possibility of doing arbitrage 

For starters, I highly recommend starting by tuning in to the BiggerPockets podcast, you'll find this to be beneficial in reaching for your goals.

There are benefits to a well-run team that might come at a cost, but IMO your goal should be to learn as much as possible in the beginning. 

It’s great for getting an idea on a prospective tenant without fees Charging an app fee is normal and common with prospective tenants.