The new condo in Hawaii needs a lot of work and I plan to move in while making the improvements.

Some renters might want to see some kind of improvement or reason for the rent being raised or they could end up leaving.

A year of lock downs and very slow movement coupled with very low housing inventory.

I let the tenants pay down my mortgages and I use my cash flow to buy more properties or to improve them in a way that increases my NOI. 

I have allocated 3 months to this flip and obviously sooner is better, but that is what was budgeted (feel free to give advice on how to improve my timeline).

That's a standard approach for many county roads, and is well-known for lower cost and durability.As long as you are trying to improve the roads, don't forget to install paved "parking pads" -- typically 20' x 20' squares to park two cars on each lot.

In my experience flippers make the quality of a city improve, but like @Greg H. said, there is the "you aren't from around here" factor at play.

Lots of competition, not a lot of inventory.

A recent Bankrate report lists low inventory, builder's inability to keep up with demand, an influx of new buyers, strict lending standards, low rates, and muted foreclosure activity as the six reasons why they believe no crash is on the horizon.

If inventory is low prices go up, if inventory is high prices go down.