There are many recent threads covering this kind of topic. Go back a few pages in this forum and you should find such info as there is, and use the search function.
My 2c: Only do an expensive rating to get a specific job, ie if Solenta tell you that you WILL get a job if you do the Van rating then, maybe. Otherwise, you will end up having spent a lot of money, and still only have a CPL, with the barest minimum of hours.
You have 210 experience which is marketable in Nam, and may be of some use in Maun. Contract flying is a step up to bigger machinery, fun, but has a limited shelf life. Very limited if you have a family. Again, some browsing of this forum will tell you a lot. Read the 'You know you're in Africa when...' thread for a few things you'll laugh at now, but may not find so funny after a few years of contract...don't worry though, it all becomes funny again once the trauma has passed and you're drinking your coffee at F370 with the AP engaged...
Good luck.