I’m young, single, solid income, no obligations – my risk appetite is quite high so I intend on being aggressive in my investment strategy. 

It all comes down to time, money, and appetite for risk in my opinion (I'd add genuine interest, but the fact that we're on a BP forum likely means you're interested in the mechanics of real estate instead of just seeing it as another investment tool). 

Will the proceeds provide a minimal, average, or excessive amount of down payment. 

As a rule, never work with a property manager whose profit depends upon your having excessive maintenance.

If you do a separate account and/or LLC for each property it is going to get excessive very quickly and it is going to be very difficult to keep track of everything. 

Over the last year there has been an excess of money for discretionary spending due to massive government stimulus.

It could appear excessive unless you have reason to believe actual criminal actions took place.

Tenants need to expect that.Second, I warn anyone going into an upstairs unit that their ordinary noise may seem excessive to the tenants downstairs.

Depending on how litigious your area/state is, you may also require them to purchase an umbrella policy for excess limits of liability.  

And it will probably be through the Excess (Surplus) Lines.