Feel free to DM/call me so i can help you with your first F&F project.

A picture is worth a 1000 words and a project we helped someone on in the UP was able to gain support and approval by getting renderings done showing what the finished project would look like.

If your "estimate" works for you and your "high estimate" is still workable for you, then you can feel confident that if you use good project management practices that you can manage the project to somewhere between those 2 numbers at worst.

Are you planning to take on another project like that soon?

There are a multitude of roles, stages, and responsibilities for each and every unique project.

I would like to be prepared for a larger multifamily project. 

Look for areas with solid rental demand, typically in Blue Collar America, where BTR projects are particularly appealing.

How did they perform versus projections?

we did that except instead of renovating it we knocked the existing home down and built a new primary. right after we were completed we had $500k in equity as we acted as the GC on the project. 

The entire project took around 3 months with EVERY square in minus the electrical( some added) being gutted and renewed.