McAllstar

Another thing: you need a reliable and reputable supplier that can give you good advice, and that has great pricing. Speak to Steve from The Powerforumstore.

You cannot go wrong with the 8kw Sunsynk. It will also future proof better than the 5kw unit. 
You probably meant to say usage is between 20 and 25kwh per day? 
Geyers are sorted so we will leave those as is. 
You need to ask yourself what your peak usage is and at what time of the day. Your house might idle at 500watt during the day but when everyone arrives home at late afternoon and start using power, there is no sunshine left and you either revert to eskom or batteries or combined. The sunsynk blends all power sources like a boss. 
For 65k worth of moneys you can get a 8kw Sunsynk, 5 x 540w panels and then all wiring, db boards, breakers etc. Wiring etc can easily run into the R10k+ area depending on lengths required. Also throw in any tools you might need to buy like I had to ie crimper, multi meter, label maker etc etc. Few trips to the hardware store for that little thing you forgot about or specd wrong can easily run into thousands. The you panels mounting hardware as well. 
So you might just just make it with 65k on a nice inverter, few panels and no battery but a decent infrastructure to build onto in the near future. 
Alternatively you could go 5kw sunsynk which allows 35amp pass through under eskom support and 5kw under load shedding. This will save you 10k to buy more panels or towards a battery. 
Then you gotta remember that say a 5kw battery with a .5c discharge rate can only supply 2.5kw to your loads. Some batteries like Hubble are rated 1c so good for 5kw discharge rate. Just keep that in mind. 
So depending on your usage patterns you will decide on what takes preference and if you must have load shedding backup then a battery is a no brainer and even a 2.4kwh battery could power your lights and tvs through load shedding. Just ensure proper essentials wiring of the DBs the. If usage is mostly when sun shines then focus on PV output. 
Bit deurmekaar but hope it helps.