I think this is a bluff and a go at the fans. £2million small change to a man who's family is hugely wealthy. Nevertheless not a healthy club.
I don't think it's as isn't as easy as tapping into his family's wealth. Yes, Chansiri is one of the sons of one of the two founding brothers of Thai Union Frozen, but one of the sons (Narin Niruttinanon) of one of the
other founding brothers (yeah, I know, Chansiri's cousin) has a 50% stake in Reading FC. TUF have given "assurances" to the EFL that both clubs are totally independent of each other, and that TUF have no influence on either club, corporate or financial. And Reading, as we all know, is as much of a basket-case of a club as Wednesday is (I guess their respective father's business acumen didn't filter down to either of them).
Chansiri is probably rich on paper, but not necessarily cash rich: at least not have enough access to ready cash in his savings account to run a football club on a monthly basis. From the day he bought the club he would have been borrowing against his shares and running all kind of schemes to try and fund the club (there were eyebrows raised when, a little after he bought Wednesday, he got sponsorship from businesses he owned which were no longer active, for instance), and I think this is probably the root of the problem: his creditors have lost their patience and his line of credit is drying up (Chansiri said that there were 'cash-flow' issues). Scrolling through articles on the interwebthingy, it looked like there were 'hopes' that Chansiri would take Wednesday back to the Premier League, but 8 years on, they're bouncing between the Championship and League One, been on the receiving end of a penalty for breaching the financial rules, and losing money hand-over-fist. His creditors have had enough.