I am looking for one that:- provides checkbooks, and - pays a decent interest rate.

Sounds like you would still need a conventional loan on top of that to bridge the difference, but it could provide down payment funds. 

Also since equity lines are typically interest only would provide lower carrying costs during planning and construction.

Good call on having a tenant provide intel.

Nor will a title company provide a complete loan package.Your friend needs a lending attorney to prepare a set of loan documents.

The competitors all provide washers/dryers, some free and some coin-operated.

This is something I can provide, depending on a few circumstances, shoot me a message, thanks!

It is a slow growth process to get comfortable debt and with responsibility.

Providing Ongoing Support:How can I create a supportive environment that fosters continuous learning and growth?

I have dozens of BRRRR's in this market and the biggest key to success here is 1 - finding sources that provide consistent deal flow2 - finding a contracting team that is reliable, communicates well, priced well, works in a timely fashion and most importantly has time for YOU.