I have so many questions

I am updating the lanai attached to our house. The lanai used to be all screens that let in dirt, water plus wind. The overhead fan got disgusting plus the tile flooring looks terrible. My replaces included taking out the screen plus replacing with air slender windows. I swapped out the tile floor for nice hardwood. I also ripped out the icky overhead fan. Now that the lanai gets no fresh air or has an overhead fan, it is sweltering. The sun pours in from the windows. I recognize love I am in a sauna or in a tanning booth. I think our next change will be getting a ductless air conditioner installed. The ductless mini split can really mount on the one wall with the outdoor air compressor outside of the wall. I could have cooling powering that small room basically all year. It would costs myself and others hardly anything. The room is air slender with the windows. No A/C would leak out plus cost myself and others cash. The ductless mini split would only affect the lanai’s temperature. It would be almost dirt cheap to cool that room for the few hours I spend out there. The only issue would be coming up with the cash to buy the ductless A/C plus install it. I already spent a ton of cash on the other lanai replaces. I can’t really afford to sink another few hundred dollars into that room. I could maybe try to make it through Winter time plus then Spring for the A/C in the Summer. That way I can gather some cash.