Extension of ur kitchen easily can chop u ~20k...30k for those ur expectation jobs done, 99.99% cant make it

Hi to all. Im a new house owner. My house is 20x65 2.5sty in puchong. Well, i will get my house keys soon around 3 months time (i think) now my worries are, is it advisable to buy items as below before getting the keys? a bit scared in view of price gain and financial (dont want to fork out a big lump later)

items which will be needed;

a) celling fans ( 8 unit)
b) fridge
c) washing machine
d) down lights (not sure how many unit) - can buy this later once the hired the plaster celling contractor
e) sofa
f) bed and matteress
g) kitchen items - hood, hob, sink n other fittings (well found LYN forumer Zheilwane, most probable will look for him on this items)
h) kitchen cabinet - noted can be booked earlier with out getting house keys
Planned renovation - kitchen extension (abt 5x20), concrete table, plaster celling in hall, divide wall in car pouch (not sure about the size),grille, wiring and adding electrical points (estimated 30k for all this)
Can i book the items listed above now n start to pay for the items in installment so i wont fork out a big sum later. so confused .

I hope some of the new house owners who just done with renovation could giv some advise on this matters