Planning KSFE chitty for house construction -doubt about collateral

Hey guys, I’m planning to take a KSFE chitty mainly for house construction. Right now, I can’t afford to go for a higher-value chitty, so I’m thinking of starting with a smaller one that I can manage, and later joining a bigger one once my finances improve.

From what I understand, KSFE usually asks for collateral, and in my case it would be land. My doubt is ...if I end up taking two chitties (one smaller now and a bigger one later), can I pledge the same land as collateral for both? Or do they require separate collateral each time?

I already tried reaching out to KSFE customer care, but they didn’t really give me a clear answer. Has anyone here gone through something similar or knows how this works?