Okay for real, even if you move out in 3 years. 50/50 chance you can take the flexDf2 out and replace it with an Apex Flex
Scan it with the right app, idk, TagInfo will probably tell you.
For real world tests use https://cyborg.ksecsolutions.com/product/mifare-desfire-ev2-8k/ and a M1 test card (just in case it only checks the first 4 bytes of any tag)
Good plan!