Can someone who has experience with wholesaling help me understand how to incorporate tax lien and auction properties into my plan of attack?

Single familyPros - available at every price point - easy to understand - comps are relatively easy to determine - numerous exit strategies available - less complex to rehab- less complex to BRRRR- better likelihood of natural appreciation - Less turnover - Fewer tenant headaches- Tenants pick up most/all of property expenses (also, no common areas)- Tenant more involved in upkeep- More financing optionsCons - a lot of competition (regular buyers, other investors)- inherently slower to scale than multi familyMulti familyPros- scale up is built in - more cash flow vs amount invested?

They take pride in the community and if you care for them properly you will find them naturally policing the park like an owner. 

I'm conservative by nature so I'll plan for the property management costs in the beginning as well.Thanks @Josh Cook, I definitely will.

The relationship will grow naturally and you’ll learn a ton, just don’t call it “mentoring”.

This is not a dig at wholesalers, it's the nature of the relationship.  

If you have slop behind it, that's from where most of the water is coming into your backyard - that wall should "capture" it and redirect it on the sides, and eventually, further out along the sides of your house following the natural ground slope (see pictures below).The backyard seems flat - one way or another you'll have to find a way to slope it and move water along.Just my 2¢.

If you don't have $1,250,000 at your disposal you should incorporate a BRRRR that will enable you to build it but it will slow you downs.ORIf you are able to generate $300/property in cashflow per month (after all expenses) - it is doable than every 10 houses will generate you the needed downpayment for another house about every 8 months. 

There are several things you will need to incorporate in the contract including that they name you as an additional insured and their company give you 30 day notice of cancellation. 

With the unpredictable nature of timeshare assessment fees and maintenance fees, I would probably avoid that deal.