There is a ton of work and even more inexperienced "flippers" and it  causes delays with people not knowing anything other than using a cell phone.  

I'll agree that people would agree with 8.333-10% vacancy but only because they are inexperienced and think because they read it on the internet that it's true. 

Possibly / probably not / no.Is the budget and time-line for an inexperienced developer likely to blow out?

We closed at a title company, but you may close with a lawyer.OUT of the agreement, but still needful:If you are inexperienced, you will want an inspection. $200-300.

I thought about it for a while and while I think a 4 unit is playing at my level as an inexperienced investor, I think I can take on something bigger.

This IS a skill perfected only through experience and repetition that unfortunately is not valued by the inexperienced investor.

Dealing with gas stations or locations of where a gas station once was is not for the inexperienced. 

In general,  you get more bang for your buck if you can read the gentrification tea leaves and get into theos neighborhoods.

A well-meaning and hard working agent can feel pressure from a homeowner or investor who has an inflated perception of the property's value, it’s a inexperienced or new agent, a part-time agent or under pressure from their broker to get listings or else.

Not really my cup of tea.