Zimzibee;
Without an IR you are seriously restricting the number of operators you could fly for as well as the type of work.
Many corporate customers don't just want an IR now, the amount of quotes for two crew is going through the roof (esp since Jan 16) and under EASA both pilots will have to be equally rated so the non-IR P2 is going to become a thing of the past.
An IR or an instructor rating is a huge financial ask, but you really need to consider one or the other. In fact if you are fairly low houred I'd go instructor for some serious hour building and then IR, or IR and offshore for some very serious hour building. But remember the transition from offshore back to onshore is quite hard (at least I found it so, but then maybe I'm just thick)
FF