SMT PCB
First, have you got plans to buy a SMT placement machine ??
If your wanting this for mass production then you really need to be discussing plans for that first, that will take a lot of money & time.
As for your circuit, you need to get some component suppliers in to talk to, ask them to give quotes on replacements for the components you use (give them a list).
Get yourself stock SMT components that will be able to replace your PTH ones, check through your designs & replace the PTH components with the SMT ones, then check if the change from PTH to SMT will be cost effective.
Will the cost of the machine, labour, components & redesign of all boards be cost effective enough to make the change worth while?
If not - then it may be best not to do it.