According to Zillow, they estimate I could rent my home for $2800 per month.

Do you have a list of what repairs you'd be doing, and estimates from licensed contractors or materials suppliers on the costs?

Get good at estimating rehab.

I am estimating 30k net profit if sold while the market is still hot.

When I comp a rental, I use the biggerpockets rent estimator then I follow it up with a call to a local property manager to verify that's an accurate market rental rate. nothing will beat calling a property manager, they have all the information you will ever need or want to make your final decision about a property.

Ask the lender for a fees worksheet or loan estimate to see the breakdown in fees.

How long for a make ready estimate?

In the process of securing estimates from GCs to develop a total cost for the project.

Yes I think you'll find tenants--take a look at rent listings and rent estimates on Zillow. 

They aren't relevant estimates, they should not be taken into consideration in decision making.