Could you clarify for me about the two front teeth that require crowns?
Are they teeth with severe periodontal disease? If so, that’s a big no! There’s no point in putting money into teeth that you’re concerned will be lost due to bone loss caused by periodontal disease.
Are these the teeth that have been worn down from grinding them? If that’s the case, i undertand the need for crowns. But again, they better be stable, healthy teeth and not teeth that will be lost.

I really can’t answer why this is continually happening. Generally periodontal disease, if caught easily, can be stopped. Once it progresses too far, then it can cause bone loss, which causes tooth loss and then it’s like dominos falling.

It’s difficult for me not being able to see what’s going on in your mouth and I don’t know your complete oral history.
I’m so sorry this is happening and I know it’s hellaciously expensive. If your goal is to have solid, working teeth again, the I’m afraid what your dentist is advising is the best route with the implants.
Brushing several times a day is good but I’m hoping there is also daily flossing. That gets into the areas between the teeth down into the gums to remove plaque, (tarter), food debris that collects in the deeper pockets of gum tissue that are the root cause of periodontal disease.

Before you jump into having crowns done, I’d wait the month until you can get to the dental school for their opinion. Just be mindful of watching what you eat. Avoid really hard or chewy foods right now. No corn on the cob, no foods that you bite hard or tear into. Cut food into small pieces which I’m sure you’re already having to do because of so many lost teeth.
I want nothing more than for you to have your smile return instead of these tears! Take a deep breath. Nothing major should be happening in this next month so don’t rush into this. If you can get into the dental school they may have a lessor fee schedule for you so that might help offset the cost.
Most dental practices take a down payment and then monthly payments instead of having you pay all at once.

You mentioned it’s a month waiting, but did you make an appointment at the dental school?