Quote From monkia:
I totally agree with you, and I am afraid of course to jump in another bad experience, however, this is going to be interview by the end of January and have to travel to the country institute for conducting the interview. One of the big concerns now is my financial situation as my contract is ending by the end of this month and I don't know whether they are going to renew it, indeed I need a vacation, but I have to financially stable, it is not easy. The other supervisor he told me he doesn't guarantee to get the fund, but he will deposit an application for me, I felt really good with another potential supervisor, however, this isn't definite. However, I agree that this junior supervisor is weird, but I will give it a try and see in him in person and see whether there are other applicants rather than me with him. Thanks again for your advice and wish for me the good luck.
I don't think you should waste your already limited finance to travel for the interview with the junior PI. It is also a very small world. The likelihood of you finding a other supervisor while interviewing with him is very small. No other supervisor would be that rude to take in another supervisor's finalist candidate. You may wish to rethink this. Additionally, what if the junior PI tries to power pressure you into accepting the position? Like introducing you to all the big players in the instute as his future student? Are you in the right state of mind to say no? Turning an interview down due to change of circumstance is always acceptable.
If finance is your main concern, it would be more rational to apply for jobs and work while searching or waiting for better opportunities. Take a break from phD. I think you need it.