Jonathan Pflueger I got seller financing 20 years 5% fixed rate 4% down and I collect rents for 6 months before making first payment.

The main problem with single family is it's hard to quickly deploy large amounts of cash. 

Car washes require regular maintenance, collecting cash, etc.

I personally recommend looking into out of state investing in a market like Columbus OH for cash flowing deals that hit the 1% rule and have lots of appreciation due to the great macroeconomics - population growth, job growth, and major companies developing here (Meta, Intel, Amazon, Google, etc.).

The cross collateralize those for your down payment on an investment grade deal.  

I understand that I can buy and move into the next property after a year... but that is only one house a year.I have heard that scaling through partnerships and DSCR loans is an avenue, but are there other ways to scale quickly with little cash on hand?

(Max vacated rents - your monthly mortgage payment) = +/- net cashflow.

This will make it easier to reconcile expenses and ensure that each property is being properly funded.Automating the payment process can also streamline the process.

In contrast, rental yields are relatively lower, which can make it challenging to cover mortgage payments and other expenses solely through rental income.

Pay cash for the property and the rehab, then do cash out refi.