Good that you included what you want to produce and what your budget is. You can produce both pieds and BELs with that budget.
You can pick up a mojo male or female and a lesser male or female then get a het pied pair for pretty cheap. I would say you could probably get a discount if you buy a pair of het pieds for around $300. With the 400, you could pick up a female mojo for around $250 to $300 and a lesser male for around $200. If you buy them together from the same person, you could probably score a discounted price.
Also, don't rule out possible hets! You could get visual morph pos hets for really cheap! The only problem is that you won't know if they are in fact carrying the gene... Bit of a gamble. It's not for everyone, but it IS an option.