First and foremost, why need to worry the future if one get the present things done right?

From a very simple investor and owner micro point of view:

DO:
1) Buy prop for investment or own stay within your capacity.
2) Have some cash in hand for some buffer if anything hits (e.g. no job, no tenant, bank installment etc.)

DONT:
1) Dont flip if one cannot hold the property such as whacking all the DIBS now and hope to sell for a profit before or during VP.
*The above circumstances does not apply to those with lotsa of money to spare.