I purchased this for an overseas move. https://www.amazon.com/dp/B078H1X1VK/ref=cm_sw_em_r_mt_dp_2PGBYK3NVV6C5KDQ9JKK?_encoding=UTF8&psc=1
You can get it in several configurations according to where you are going.
Honestly, I decided against the move, but I saw something similar in use while I was visiting and advised to buy one. All the best!
For what it's worth I made the same mistake. Works perfectly for me with a 2000watt 240v-120v step down converter. Seems to need ≈1400watts at peak for the suction motor. This is the transformer I'm using: https://www.amazon.com/dp/B078H1X1VK?ref=ppx_yo2_dt_b_product_details&th=1 You'd probably get away with a 1500w transformer.
A bit annoying, but you can run that off of one of these transformers. The motor is universal, so it doesn't care about the 50Hz/60Hz issue.
https://www.amazon.com/Voltage-Converter-1600Watts-Capacity-Output/dp/B078H1X1VK
Found this : https://www.amazon.com/Voltage-Converter-2000Watts-Japan-Appliance/dp/B078H1X1VK It ticks every box but as you said its as expensive as the airfryer, oh well we live and learn