90 Degree Pulley Belt System

I really wish we could add pictures here. It's nearly impossible to explain. So I'll add this Google picture link instead

https://images.app.goo.gl/Z9NRR5zp7fhMBVCbA

I am trying to convert power from a vertical shaft small engine to the horizontal plane. So I came up with a pulley design that could do it. I found a diagram that is very similar shown in the link (ignore the hand crank portion and red line).

It is a 90 degree pulley change with the engine shaft in the z axis being adapted to the x axis. It is a four pulley system.

As for belts maybe rope belt or hexagonal rope belt.

What I'm wondering is if there are any cons to this system? I know I could use gears however that would go beyond the budget to manufacture.