Hi Easy,
Although some of the above replies a worded a little harshly, they are generally good advice and I'm sure the posters are intending to be helpful.
Having read the AIC, White 1/2011, to answer your question in post #3, it would appear that a person can pay an instructor to be trained in an EASA aircraft. But that's not at all the same thing as it being a good idea for you to undertake such a venture.
What type is the group aircraft you're considering using? Is it something common that flying schools will have experience with?
Also, as BEagle pointed out earlier, the student must own a share, not you.
Have you looked into the costs of changing the insurance from "group" to "training" use and what that may cost?
So, while it all seems to be theoretically possible, as RTN11 advised, by far the simpler and more sensible way, is to approach a school, bring your own students, but use their aircraft/approvals/supervision, especially given your experience.
If you walked into my school, I would seriously try and convince you to use our aircraft. However, if you were really insistent on trying to use yours, I'd look into it and consider it, maybe. So, by all means go out and approach a few flying schools locally and see what happens, you're no worse off for asking.
I'd be really surprised if you couldn't find somewhere to do this for you, one way or another. Where you will have some difficulty, is I think getting back into teaching the whole syllabus, 2 years after your course, with only a few hours of "check flights and TLs" effectively. You need to find somewhere with a good and willing supervising FI, they will of course also have to fly with your students to authorise first solo etc.
Further to your accumulated 60 hours of "instructing". I'm not sure that you can legally be doing that, as LASORS states (my red/bold) a FI(R) cannot do anything unless they are under the supervision of an approved FI.
Restricted Privileges
Until the holder of a FI(A) rating has completed at least 100
hours flight instruction and, in addition, has supervised at
least 25 student solo flights, the privileges of the rating
are restricted.
The restriction will be removed from the rating when
the above requirements have been met and on the
recommendation of the supervising FI(A) (Please refer to
Section H1.4 – Removal of Supervisory Restriction).
Restrictions: The privileges are restricted to carrying out
under the supervision of FI(A) approved for this purpose
a. Flight instruction for the issue of the JAR-FCL
PPL(A) or those parts of a CPL(A) or ATPL(A)
integrated course at PPL(A) level. Class and Type
ratings for single engine aeroplanes, excluding
approval of first solo flights by day or by night and
first solo navigation flights by day or by night; and
b. Night flying instruction, provided a night qualification
or rating is held, the ability to instruct at night has
been demonstrated to a FI(A) authorised to conduct
FI(A) training in accordance with JAR-FCL 1.330(f)
and the night currency requirement of JAR-FCL
1.026 is satisfied