u/Top-Replacement-3694

I am a US citizen planning to visit Russia in October. I’ll be going with my boyfriend, a dual US/ Russian citizen, to visit his family. We’ll be staying with his parents and grandparents. His parents are willing to complete whatever is needed by the MVD for a private invitation, however, I’m seeing a lot of mixed timeframes online about how long this process takes. I’m seeing most commonly 90 days which would not work for my trip. Anybody do this recently? Would I be better off paying a Russian tourist operator for a tourist invitation? Any advice would be appreciated!