Bros/Sis/Pros,

I'm going to change my gate, build car porch, change doors, change windows, change floor tiles, change ceilling, paint the whole house, extension on the back for a toilet, and put tiles and cement on my lubang stair.

I asked 2 contractor to bundle those and their price are quite high.
So I want to separate each job for different contractor for better budget.

However I dont know how to do it, call them at once and let them figure it out ?
Or I should call the one who do the extension first, then tiles or windows, step by step ?
Any advice or guidance ? Thanks !