the more MDF you use the less glass you have to use. ..
when working with glass , espically when its first time, it can get real ugly and messy and your gonna do things 4 times over. Practice on making something smaller first. . . because ALOT of sanding is involved.
I think for your application MDF for the BASE and FOUR sides would be good. But i would mount the rings at different angles inside the MDF frame and then glass the top. . . of course trying to make it blend as much as possiable with the edges of the trunk, but that would be my idea. ..
fitting 4 12's is kinda . .eh . .. meh. .. i would just work with a 10w7 or somthin, that's a lot of noise and a lot of weight, and a lot of space you need, but dont get me wrong you can do it. . .
for time frame, if its your first attempt, and you work on it everyday, and few hours a day. . . (based on my idea of how i'd make it look) i'd say you could be done in, 2 weeks tops. but for a first timer, a month of so.
a shop will charge you prob like 70$/hr and will quote you 500$+. . just to build it, and that im GUSSING.
do it urself.. learn.. and then re-do it and do it the "more efficent way". a little glass goes a LONGGG way in strength.
and i'd say for supplies. . .
1. Paint Brushes ( 10$ )
2. Fiberglass Mat ( 30$ )
3. 1 Gallon of Fiberglass ( 30$)
4. Gloves ( 5$ )
5. MDF ( 24$ / 4 Slabs , and that extra wood)
= A HELL OF ALOT CHEAPER THEN A SHOP DOING IT, plus you learn somthing.
i think i blabb'd on enough. . .i have pics of my glassing if you want to see also
Work like you really dont need the money
Love like you have never been hurt before
Dance like no one is watching. . .