I think they have temporarily stopped taking new applications. There was a backdoor link posted earlier in this thread a 2-3 days back.

I used this below link to see rates and apply, but now it comes up with no results. So I suspect they are working to catch up

https://app.lenderfi.com/partner/C8AX0T65/search?type=refinance&campaign=organic

How do you apply with LenderFi because there website has nothing?  Do you have to call?

Website. But I would give a secondary email. (From my experience they email frequently to follow up)

Cost basis of home = purchase price + closing costs + upgrades for the home (flooring, paint, window coverings, etc) - credits (from agent, lender, or seller/builder)

Gain/Loss = Sale price - cost basis of home - closing costs (including commission and 3rd party costs) - credits to buyer (if any).

Also, keep in mind that there is only a $1m lifetime gain exemption per individual.

Do interior things like window treatments and flooring and painting count as capital improvements? 

With EW as already established neighbourhood, I would expect price to be same or may be even higher than OH.