I am a UK solicitor but this is a simple question/answer service. If you wish for specfic advice then you would have to isntruct a Uk solicitor in the normal way.
If you have not earned any money from employment whilst you have been in mexico until now and do not have anyone who is able to gift you the money required to meet the financial requirement via savings (which you would then have to hold for 6 months before applying) then you do not meet the spouse visa eligilbility right now.
This means that your wife would have to apply for a visa independently of your relationship. Assuming that you do not have access to £200, 000 gbp for investment in a uk business and that she is not a world leader in her employment field and the company she works for does not intend to employ he in the uK then her options are limited:
1. Tier 2 Sponsored Skilled worker visa - https://www.gov.uk/tier-2-general - You will have to see if there is a job that you could do in the UK on the shortage occupation list: (https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-k-shortage-occupation-list - see table 1 on the link). She would have to obtain a job offer in the UK from a UK employer for one of the jobs and then isntruct a solicitor to apply on this basis
2. Tier 4 adult student visa - https://www.gov.uk/tier-4-general-visa/apply - this is a visa which would allow her to come to the UK to study in order to stay here until such time as you are able to build up your UK employment.
Otherwise, you (alone) would have to return to the Uk to work so that you could then apply after 6 months salaried employement for a spouse visa.
I am sorry the options are so thin, the rules are very harsh in your circumstance but would be grateful if you would please leave feedback on the basis of the accuracy of my answer.