No, you need liquid funds either in current or saving account under your name; not a business account. Nothing else, not even mutual funds, bonds, debentures, shares, crypto, nothing.
While you apply DTV, it's in process, and unless it's approved/ reject. You can't be inside Thailand for any of this period. Once you get DTV, you can't use any other visa for border movement of Thailand (in/out). DTV is superior category visa so you must always use it.
What do you mean by 2nd 90 day reporting? It's not usually needed unless you did first report well advanced? Otherwise, you just leave the country before 180 days clock hits. Or do you mean 2nd report within the year i.e., it's your 9th month?
Since DTV holders can't open a bank account, all the money we bring is unofficial (by cash while arriving or ATM withdrawal). There's no tax on us, no one can enforce anything since we don't have a bank account.
As explained by DTV Beg Pecker, you have to provide personal bank statement generated from your online banking (web or mobile app). Even if he's receiving salary/ payment in business account, he must show 500K+ Baht in a PERSONAL ACCOUNT, even if it's for a couple of weeks. No exceptions. They gave you a second chance but you failed.
Don't mail, don't ask questions, don't change dates. Let the process happen naturally. There is no high or low priority. Your visa can be processed in 2 days or 1 month, no one knows. About travel dates: They are as irrelevant to embassy as British cuisine, quoting