Im gonna recommend that you do mate. The quality of the DHZ parts are awesome and the rear shock mount issue has been amended in the newer models. The geometry of the crf70 style bikes are nice and combined with the 160ho/155z they perform really well. As with all bikes a bit of initial TLC in locktighting and greasing bits will make this bike last alot longer.
Others will have other opinions no doubt, but at the end of the day it's your bike and your gonna be riding it, so if you like it and it brings you joy the Why not?
I have just spent a weekend away camping and rididng and my bike went awsome. Didnt miss a beat all weekend and it flys.
The frame is an issure but can be fixed very easily and the rims buckle as im sure most do. I recommend buying one. You will love it.
Constant maintenance. I change the oil regularly. Air filter cleaned after every ride.Cleaned after every heat of racing. Use a pre filter on the air filter. Let it warm up before riding it. Check valve clearances regularly. Keep the bike clean and everything greased.