Annuity for life

Got a share of a House. 58% is 4 Room plus 2 Bath,cellar and some Garden but no Kits.
Part-Owner will buy my Share i will not as i may need it when retired for few Month over the Year.
Thinking charge them or another a Lump-sum ,ruffly half of it and Rest in monthly Payment till my death.
Not sure how to do that exactly,and not said i’ll do it with Part-Owner