That should be your focus, not how to purchase the land.  

For the BRRRR process I plan on using a hard money lender for the rehab process for the SFH's but what I'm not sure of is, should I purchase a duplex and rent one unit out and live in the other or should I just rent for now, not purchase a duplex and just purchase a SFH with cash and start BRRRR'n immediately?

We have one other mobile home park and this property will determine my desire to buy more or sell.

This involves working backward from the final aim to determine the steps.

But i was able to achieve the elusive infinite return on a majority of my RE and all of my investment RE that I purchased prior to 2020.Infinite return has the benefit that the finances are not the hindrance to scale.  

I suggest that you set clear goals and determine the types of properties you wish to pursue.

I know when I was an active Broker my SOP  was get listing open escrow with buyer to be determined and order the preliminary title report prior to spending money on marketing someones property..

@Isaac Terry Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

This move is such a great example of what determination, solid planning, and truly listening to investors’ needs can achieve.

@Rory DarcyRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?