getting ready for a build log

as some of you know i was hit by a drunk driver a few months ago and now my settlement is almost over and im almost ready to start a build log when i recieve my money i want to keep my budget around the upper 5 thousand range it can go over some if i need to but i want to go 2 18s i was thinking two team fi 18s and a cresendo 5500 at .5 ohm or should i just get the sp4s or zv4s my goals are too tune around 32htz range i have a toyota tacoma double cab and im going to take the back seats out and wall it off so ill have around 10-14 sq ft in air space so ill be good on air space on any of these im pretty set on the cresendo 5500 so something i can run off of it and my eletrical will be more than enough upgraded alt and some batterys I just need some input on which subs i should get since i have not seen any of these in person but i have had a bl 18 and liked it alot