This method allows you to take some of the profit tax free and indefinitely defer the rest of tax, using it to purchase larger, nicer property/properties in areas with better cash flow potential.

I know that would be the easiest approach but wondering your thoughts.2.

Nathan's search method usually works, but I use what Google suggests: '<search item> site:www.biggerpockets.com' (without the single quotes on the Google search bar.) 

Hey Marshall,I would consider going the BRRRR method.

If you are seen to be using this for investments, then you will find it hard to get another FHA loan, making this method difficult to scale, but good when you are getting started.

Also, is there any method you know of to shorten the cash cycle?

2.For purchases made on a credit card, is it best to use separate cards, or are there good methods for tracking expenses by property?

Easiest to view if you just filter by recently sold homes. 

Our city code requires a method of egress for 3rd Floor units.

All I’m doing is educating and sharing my methods, for free.