I have to first say that I'm jealous lol. I have been wanting to build something like this for a long time and have recently been looking hard at waggys for this exact type of build. However I am very meticulous and picky about my rigs. I have found some nice waggys for a more than fair price, but the fact remains that they would all need more monetary attention than I am able to provide at this time to satisfy me, especially when it comes to dependability. That being said, it would still be my first choice for this type of build! They are one of the most comfortable rigs I've ever driven, and have the perfect size/space. I also looked at Burbs, but they are a little too big IMO. I am also a die hard believer in Toyota's, but I trust the mini stuff much more than the cruisers. I also feel like you get more for your money (value) with the waggy. Cruisers are def cool and I respect them, but the initial cost is out of sight, and thats mainly due to popularity and trends. I will be building a waggy like this once I'm done with school and am more established in my career.
My build plans are as fallows: 1st) find the most solid bodied and complete waggy I can for cheap (hopefully with a bad engine or tranny), 2nd) prepare for a 5.3L GM engine swap including a 4l60e and atlas or d300, by collecting the parts and wiring harness stuff. ( I strongly feel like this would be the single most effective mod that could be done for many reasons!!!) 3rd) Find a D60 rear and have it cut down to stock waggy width and converted to 6 lug ( or you could convert the front easily to 8 lug) slap on a disk conversion too. 4th) from here basically the rest of a standard build, suspension, steering, expo accessories, ect.
I personally would spring over the front on stock springs and make the rear match by whatever means necessary ( springs from another truck, shackle flip, custom alcans, whatever). If money was left over or no object, I would consider a linked front with coils and shocks to keep it a bit lower than a traditional SOA, maintain a nice ride quality, and forgo the maintenance involved with CO's or air shocks. I would still stick to leaves in the rear for load carrying capacity. I'm not sure if the waggy axles would have enough room for the coil buckets on the short side though, which might warrant going to full width axles, and I'm not sure that would be something I would want on an expo rig.