Find out the pricing from online store. Cash and carry at physical shop (can nego down close to online pricing) will maintain the AC in pristine condition (if you can lift 25-30kg ODU) which is about a fully loaded gas tong.
Coz the online seller tend to use courier service which may result in bent fins. Carry ourselves sure 100% no issue. Aircon boxes only protect for stacking (they have foam moulding at the ends only, nothing in center so susceptible to crush damage in transit). If drive sedan usually 1 ODU may take up whole boot and IDU put in the back seat. Drive hatchback like myvi all also can when fold down back seat. If distance close by from seller, order a Grab can be cheaper than paying for delivery fees

Advantage of buy online (esp with self collect option) is that you can lock in the exact model, whereas physical store usually only have the very latest. On a btu spec perspective latest is not always better due to cost cutting, they make lighter and smaller coils, save cost, but btu suffers, user complain not cold.

The recommended panel installer from shop usually does a better job than the heavily advertised ones.

Selection of AC.. try to get as close to 10000 btu per 1hp as possible
Dulu dulu in the prehistoric era of R22 York AC their 1hp really 10k btu.

Nowadays closest 1hp also only 9700btu for best-in-class, 9200 is ok-lah, 9000 is "buy something else" cost cutting design.
For so-called 1.5hp do bear in mind its actually about 1.3hp true performance. best in class is 12600 btu, 12400 is ok-lah, 12k or below "buy something else".

Can check out the AHX9VED2 (9700btu) and CS-PU9VKH-1 (9550btu) 1hp
https://shopee.com.my/SHARP-1.0-HP-R32-INVE...7262.1183428000

For 1.5hp AHX12VED2 (12,500 btu) and CU-S13SKH (12,500 btu) as well
https://shopee.com.my/SHARP-1.5HP-R32-INVER...7262.8310856350

this seller one can self collect