Understandable. When the time is right I hope it works out perfectly for you! I am excited for my circumstances to enable such myself. Just a foot note, they do make table top ones at a decent price.
Wish you the best with your future plans!
This is also my suggestion. You could pair it with a standing desk converter as well. I have this one and I absolutely love it for my cintiq computer: https://www.amazon.com/dp/B0762K7JJT/ref=cm_sw_r_cp_awdb_imm_FQ8T5TYWTT1B6BCNMS9D?_encoding=UTF8&psc=1
A stand up desk, 'desk converter' may suit your needs:
We used these at my office until we got actual standing desks. I didnt shop around or anything, you may be able to find a better deal
Standing desk! here’s mine! looks like it’s discounted for prime day!
I personally have never seen that but I have seen this
It's basically a computer workstation that can go up and down. I would imagine you could build something that functions similarly, as long as the desktop you're thinking about is light enough. You would just Mount a track system. Probably have one on each end and one in the middle. Maybe sliding dovetail bars with some sort of latch or catch.
If the desktop is going to be really heavy then you may need a different approach.
What most people use for this situation is just one of those desk risers.
FLEXISPOT Standing Desk Converter 28 Inches Stand up Desk Riser, Height Adjustable Home Office Desk with Deep Keyboard Tray for Laptop (M7B) https://www.amazon.com/dp/B0762K7JJT/ref=cm_sw_r_apan_glt_fabc_GBYGCPG89BWF1RRT5NK8