We've already established on this thread that these companies are illegal so i wouldn't trust this preference thing, just looks like another shady structure
Apartments are different to condos, can easily be rented daily or monthly, can be 6k+ a month, look around the area you want to stay, or be specific and people might be able to recommend places
Kinda agree, i did use COD briefly because I didn't trust items from China would arrive (like AliExpress), doesn't seem to be a problem on Lazada so now no COD
hotel business card stapled to the invoice makes it look better but not essential. You'll also need 1-2 photos and application form. Can get photos inside by photocopier boy