There is another option, though it requires basic tools for the modification.
Find a damaged 50 or 60cc chainsaw with a decompression starter button. Go to a welder who is good with aluminium and get him to build up a small area on the top face of the cylinder head that can take the length of the threaded portion of the decompression device.
Drill a 2mm hole through the welded area to the internal cylinder head face.
Now drill only the length of the threaded portion with a drill bit sized to be suitable to allow enough material for a bottoming tap to create a thread that matches the decompression button threaded length, plus clearance for the internal component of the decompression valve. Make sure the top surface of the welded portion is true and flat. Screw in the decomp and your starting issues will no longer be a problem.
You can easily spin that engine till it starts.
It's a bit of mucking about but it works a treat, especially if using a high compression cylinder head.
