Even though title itself seems quite similar to other questions asked here, my question is a bit different from other similar questions. I know it's a bit long, but I do appreciate anyone who has a read through it.
I am a Ph.D. student in UK and it has been 5 months since I started. My topic was something completely new (to me) so as one might guess, I've spent these 5 months reviewing the literature and covering what I didn't know. Problems started right here.
I am working at a Research Institute that has expertise on something totally different than my Ph.D. (let's name it field A, and name my Ph.D. field B). Simply, A and B have nothing in common (except both are engineering topics, but sub-fields are different). As a result, this laboratory doesn't have the required equipment or facilities that I need for my Ph.D. most importantly, there is not a single person around me in the lab who has a single bit of knowledge about my topic, thus no practical help or chances of hands on experience. Speaking of the good parts; I am getting a proper work experience (since this research institute has industrial focus), my scholarship is a substantial amount and my supervisor (even though he is sort of clueless about my topic, he is a huge figure in field A) is quite impressed with my progress.
But, as always, I have an alternative. There is another lab in my university which has expertise on field B (my Ph.D.). In this lab, there are people who have expertise in field B and of course, director of the lab is a powerful figure in field B. I know it sounds good so far, but here are the cons of this alternative: Lab director can't give any sort of guarantees regarding a scholarship (which means I have to pay tuition fees as well, good old UK) and wants me to work in a new project(a new field, field C). This field C, again completely different from A and B, is a newer topic compared to B and there are lots of research going on in this field. Field B is sort of an established field, I am just trying to squeeze whatever's left out it.
So on one side, I have a good working experience, Ph.D. in field B, an impressed supervisor, yet no practical help about field B or collaboration whatsoever. On the other side, I have a group of people who have expertise in field B and C, yet no money. I personally don't have any problems about changing my Ph.D. from B to C, the only disadvantage will be losing 6 months of work and naturally, getting 6 months of extension in the end. On the plus side, I already have a paper waiting to be published (in field A though, not in my Ph.D. topic field B). Therefore, these 6 months won't be "that" lost.
So, both sides are waiting to hear from me as soon as possible. I have to make a decision by this Friday. Last thing that should be mentioned is my current lab is located in city 1, whereas the other one is located in city 2. I hate city 1 (current city), whereas I am in love with city 2.
Financially, I am promised by the other professor that depending on my performance, I can get funding. I do know I can't trust this, though I believe I can cover my expenses throughout my Ph.D. including tuition fees. So, money is not a big problem right now.
If I go to the other lab, field C will be my Ph.D. as well as my work, hence shielding me from dividing into two as I do right now for field A and B.
My question is simple, what would you do if you were me? I have exhausted my friends and my family about this issue and I need a fresh pair of eyes and neurons to help me out. I do appreciate any questions and comments.