crossroads between continue working or going to a PhD
First of all, nobody can tell you what the best decision for you in such a decision is.

That said, what you need to look at are the opportunity costs of your different options. What do you gain from each of the different possible choices? Equally important is to ask yourself what will you have to give up to pursue those choices. 

For you, you need to ask yourself: 


How important is being a researcher compared to being a lecturer?
How difficult do you think it will be to get a position when you finish your PhD?
Is your offer of graduate admission worth the upheaval it would cause in your life?


And other questions like these. Once you get a feel for how important these issues are to you, the easier it will be to make a decision. It will still be a very tough decision (these sorts of choices always are), but ultimately it will be your decision, and you'll need to be comfortable with the decision you've reached.