One of the many problems with my old Rogue Trader ork army is they desperately needed a Battle Wagon but the model was out of print even then in the early 90s. Now there are all manner of plastic ork vehicles. I eventually added a looted Rhino to my ork army plus several metal wartracks, now the massed light vehicle ork army is much more feasible in 40K as it was all along in Epic. I believe Thor has created an elaborately converted Cult of Speed army. This model and its Big Scorcher with Extra Ammo was converted for Gorkamorka. Note the old metal ork Heavy Flamer used for extra authenticity. It came with both foot sloggers and as part of the original Ork Dreadnought (sometimes).
In 2020 I have no plans to paint Space Orks. My plan is to paint a few more goblins so I have my proposed Warcry gang then I'll paint my Escher gang and around that I plan to paint plenty of Nurglings and even some more Gretchin. Then I'll slowly update all seven of my Plaguemarine squads.