I actually noticed a significant decrease in response rate by sending the same type of marketing piece month-after-month.

Ways to increase NOI can be increasing operating revenues or creating new operating revenue sources, decreasing operating expense or eliminating operating expenses.I noticed that you are working on a condo and a 4plex.

High initial cash flow, but decreasing over time as CapEx, etc. catch up.High demand and ample supply (Phoenix) = prices and rents keep up with inflation over the long term ... they may overshoot or undershoot inflation in the short term in hot or cold markets, but long term average will keep with inflation.

Perhaps transition from short term to long term property so your turnover is largely eliminated and the frustration decreased.

Plus depreciation, mortgage interest deduction, and other deductions between multiple properties that increase your deductible expenses, decrease your taxable income and thus tax burden.

Some crowd sites do an ok job of filtering but they can't filter too much or they decrease revenue.

If you are working with multiple investors that may be the case, but trust me, investors are working with numerous agents and wholesalers which decreases the opportunity for an accepted contract.Finally, if an agent understands what a good deal is, then less contracts are delivered, but more contracts get accepted and everyone wins. 

I am going to write the lender and ask that they decrease the draw amount to $100 given that we had no notice and it's not in our loan docs, but we do want to build a good relationship with them.

What are the other kind of protections and reduction of liability that can be pursued to decrease your overall personal responsibility and assets?

A move like this helps with long term budgeting, as overall capital deployments & monthly liabilities decrease.