I got my PSW rejected today with appeal deadline of 15th April

The refusal ground is the maintenance funds falling below 800GBP for 12 days in November(I made my application in late Jan).
I am thinking of appealing with the balance info of my home country bank account as an additional evidence,
but I don't know if they would accept the overseas account as evidence? (after further research: YES they do accept overseas account balance)
also I heard the appeal process usually takes around 6 months or even longer.
Then would it be the better option to go back and make a fresh application once I had the three-months-2800GBP condition met?
Please help... and if any of you know any good (and reasonable) immigration solicitor I would be grateful to have recommendations.
Thank you so much in advance, it's a comfort to have people who share the similar experiences (if frustrating) in time of panic

Cheers,
Seryu