Thats the route I took.Well almost... I got a Lesser pastel male and a very nice spider female.That ran me around $1,500.I would say that its not unreasonable to say you could get the genetics you need for around $2,000.Though if you have the extra $ you could get a QueenBee for around $3,000+ and be a step ahead and breed her to something like a Ghost and have a chance of all these but being 100% het for Ghost!
Queenbees (Lesser Pastel Spider)
Lesser bees (Lesser Spider)
Bumblebees (Pastel Spider)
Lesser Pastels
Lessers
Spiders
Pastels
Normals
Think about that a QueenBee Ghost....