>>399637803
I think that lighthouses and valve controllers are always worth investing in, simply because you can use them with the Deckard when/if it comes out due to all lighthouse gear being forward compatible. 

Waiting however is dumb when the Deckard hasn't even been announced yet and could easily end up like HL2 Episode 3, L4D3, and numerous other Valve projects that get canned partway through development. The best move right now IMO would be to just get a Quest 2 cheap and get rid of it when something better comes out rather than not having VR at all.