I understand your concerns and yes you do have to be very motivated to do PD correctly and safely, I am a lot younger and wanted to stay in work. It is what works best for you, and what you feel you can sustain long term.
Just another point though about Haemo. I started at GFR 7 but only had to do two sessions a week, and because I still passed enough urine (I got some strange looks from fellow patients as I was the only one asking for a bottle halfway through!), never had to have excess fluid taken off. i also had a low pump speed which helped preserve remaining function. The good news is I did feel a lot better once started, the energy came back.
I too am struggling with Phosphate, like you say it's in everything, especially ready meals and cold meats.
I wish you both all the best for the future