I'm in Miami FL right now for 45 days for business development and they allow for densities as high as 1000 units per acre. in Columbus it might be 50 units per acre. density always wins and drives down land cost. keep land under 10% of asset value upon completion. those are my best tips to get started 

A vacant and re-habbed unit allows the option of a tenant to move into it, thus freeing up the next unit. 

Raise your deductible.

In the past there were more options to get creative with seller financing etc to put down less than that, but now the primary lender in general won't allow this as they want to assure you have sufficient skin in the game.

A 1031 exchange, also known as a like-kind exchange, allows taxpayers to defer capital gains taxes on the sale of certain types of property if they reinvest the proceeds into a similar type of property.

You should make sure that the rental revenue meets all of your costs, including the mortgage payment, property taxes, insurance, maintenance, and vacancy allowance, since monthly rental prices might range from $1,000 to $1,600.Property Appreciation: Take into account the market's expected and past rates of property appreciation.

Could be partly due to my financial situation, but definitely due to my built up Passive Allowed Losses (PAL). 

For 4-5k/unit you can probably just get hookups in the actual unit provided the layout allows. 

Why do the courts allow such HOA auctions to take place when it creates more financial burden to the general public?  

Different laws and of course everyone has to do their due diligence on what is and isn't allowed.