Let’s look at the impact those last two have had on the time it takes to deliver a new home (or apartment building).Stages in New Home ConstructionApplication for Construction PermitPermit Approval (2–12 months after application depending on where/what you want to build)Start (2.8 months after approval for MF, 1.3 months after approval for SFH)Under ConstructionCompletion (17 months after start for MF, 8.3 months after start for SFH)What does this mean?

Either is delivering packages but people do it, make other people and themselves money and enjoy it. 

Particularly around the Springfield Town Center, where 2 million square feet of commercial space and thousands of residential units are in the works by property owner Pennsylvania Real Estate Investment Trust (PREIT), to be delivered by 2026.Below I will go into the reasons why Springfield Virginia real estate market has strong potential for future growth in the coming yearsSpringfield Town Center is Approved to add 2 million Square Feet of Commercial Space and Thousands of Residential Units, Coming in 2026Although many malls suffered greatly during COVID-19, certain malls have begun to make a comeback, such as the Springfield Town Center, which not only is at pre-pandemic levels of visitors and retail vacancy of 4%, but the average time of visit has increased for the mall.

(I am assuming, from your post, that the tenant made no other arrangements - in writing - as to where to *send/deliver* the itemized list and any amount due.)Note that the law is mum on forwarding or not forwarding the first class letter that you shall mail.

For instance:At 0°F, a 36,000 BTU heat pump might still deliver close to its full capacity, around 37,000 BTUs.At -4°F, the capacity might decrease slightly to about 35,800 BTUs.At -13°F, the capacity could further drop to around 32,000 BTUs.At -22°F, you might only get about 28,000 BTUs.This reduction in capacity occurs because, as the outdoor temperature decreases, the heat pump has to work harder to extract heat from the air, which becomes more challenging as it gets colder.

It is the delay in getting financing in a timely manner so that I may begin my rehab on my fix and flip that is making me feel not very confident in their ability to deliver.

I would say at minimum you need your lease, your 3day notice letter, mail receipts, pictures, etc, also perhaps a copy of your bank statement where you show they paid rent, then didn't.Get busy with this....if they can't pay $900 or whatever this month, no way they can probably pay $1800 next month or $2700 in month 3.One thing that might save you time.....mail, certify mail, and hand deliver your 3 day notice. 

If a 20 x 8.5 unit delivered is $3000 and it rents for $90 per month that is 3%, at a time when 1% is hard to find.

You have to know when your initial text goes out, because the response is going to be instant, and you better reply to their reply instantly, but if you don't know they are going out then you cannot make sure you are there.

. - Wait and hope that they deliver returns.