Prepare to enter the pit of photography, please give me a suggestion, budget about 10 thousand plus lens, mainly to take pictures and shoot short videos.

The budget is about 1w, and the lens is needed, but a7r2 is1w. This budget can invest a6400/6500 sets of machines+Sigma Three Musketeers (s 16 s30 s56), and the picture quality is roughly equivalent to twice the budget level of a7r2 (Sony's full-length lens is expensive), as well as a lightweight body and a 6K upgraded to 4K; Screen 180 degree flip, interface with touch screen. How many years ago, a7m2 was a machine, and its image quality was the same as a7, even slightly worse, except that it had a five-axis anti-shake and no 4k for video shooting.