I picked up a PF-1000 today as my overflow box.
So far ive spent,
20$ on acrylic,
25$ in bioballs,
30$ for a 20L,
14$ for eggcrate,
5-10$ on DAP silicone,
= 94-99$ overall on the sump.
70$ for my overflow, and I got a pondmaster rated for 700gph for free from a friend. I just need pvc and it will be complete.
Sand and Driftwood to come later.