Quintrix

68kWh per day is fairly high
I would start by  reducing load, ( not necessarily lifestyle changes)
Do you really need all 5 geysers? YES ( I would include them in solar)
smaller heating elements in geysers (2kW)  / replace lesser used with small gas geyser
insulate pipes and geyser blanket ( you have a lot of geysers to feed so protect your gains/heat)
gas for cooking
LED lights
Installing solar while your demand is still fairly high will not remove "the look" as you may not have enough storage and it will just frustrate you. You will in any case start looking at load reduction as soon as your solar is installed.
 
Different approach ( if your budget is truly tight)
Get an Efergy and track your consumption and see how much of that you can shift to "sunshine " hours. Only run your geyser for a few hours during the day and see if it is ok.
This will give you a better idea of what your needs are/system size required. I would guess at least 20kWh storage
 

Its a common sight for me to see this type of crap wiring ... normally the response from the customer would be ... "but its worked like that for 20 years, why are you saying its illegal ?" 
Open wiring ... has a code .. .but that type of wiring would be a code violation.
Open joints taped up like that ... are code violations.
Using blue wires as a neutral or earth/CPC ... it gets interesting ... because we use the blue as a phase wire ... however in a domestic installations ... people seem to feel it is ok because the cabtyre neutral is blue ... you are allowed to wiring up your house using cabtyre ... provided you take certain regulations into consideration ... personally I would put a short piece of heat shrink on the blue wire to identify it is "black/neutral" or green/yellow for earth ... or even strip the insulation  if the blue is used as the earth wire. 
Just looking at those pictures (a bit difficult to see what is actually going on) ... I don't see a green/yellow earth.
I am assuming they didn't issue a COC ? 
A tip for anyone who calls an electrician ... every single semi skilled or skilled person in the electrical industry has some form of identification.
For example an eleconop 1 /2/3 
Electrician 
Single phase tester 
Installation electrician
Master electrician 
Each skill level has limits ... except a master electrician. 
If you call an electrical company to install a plug ... the person who installs the "isolated wiring" could be an elconop 1/2/3 for example ... however as soon as the wires are live then the minimum level would be a qualified electrician.
It is your responsibility as the owner or person renting to make sure the electrical work is reasonably safe ... so you as the owner would need to verify that the people dropped off on site are suitably qualified to carry the work they do ... as crazy as that sounds. 
My advise to you ... when people are dropped on site request the staff wear their card with their skill level ... in fact request a copy of each person skill level. 
The pictures above look like a labourer (unskilled person) did the wiring.