I agree with everything that has been said about declawing it's nothing but mutilation and not fair to the cat.
A cat-tree is simple to make,we used a 4x4 piece of lumber we already had,attached 3 shelves covered in left-over carpeting and sisal-rope.
I have 3 cats all with claws,2 cats we trim ourselves,my feisty tabby gets trimmed by the vet.
Here's the cat-tree.
"The cruelest animal is the Human animal"
3 kitties,Rocky(r.i.p my boy),Chico,Vinnie