Yet another which board question!

Been surfing rental softboards and bic 7'9 mini mals for a bit I can pop up on unbroken waves and i'm trying basic turns but i'm struggling to turn the mini mals.
I've had to stick with rentals til now due to no transport but i've just got a car so i'm looking to buy a board so I can get surfing more often.
I was looking at saving some more cash and buying a custom 7'2 mini mal but there's a 2nd hand fat boy flyer advertised locally that i'm tempted to buy if it would be suitable for me.
The dimensions of the flyer are 7'2 x 21 x 2 7/8"
I'm 5'8 and 9 stone.
Would the flyer be a good choice or should I wait till i've got the cash to get the mini mal!
I've had to stick with rentals til now due to no transport but i've just got a car so i'm looking to buy a board so I can get surfing more often.
I was looking at saving some more cash and buying a custom 7'2 mini mal but there's a 2nd hand fat boy flyer advertised locally that i'm tempted to buy if it would be suitable for me.
The dimensions of the flyer are 7'2 x 21 x 2 7/8"
I'm 5'8 and 9 stone.
Would the flyer be a good choice or should I wait till i've got the cash to get the mini mal!