Unless you already know a good reliable, competent electrician, capable of doing an accurate periodic inspection, spending money on an EICR on a property you still haven't actually purchased can be a bit of a "heads they will", "tails you lose", pi55ing in the wind exercise...
And could just be giving money to a dubious tradesperson for a useless report on a potential property purchase, that your offer is not accepted for anyway!
If there are no previous paperwork records, or certificates, available then some of the labour for EICR is just to find out which circuits supply which rooms/accessories..
I have recently spent just under two days doing comprehensive inspections on a property one of my previous customers has just moved into. There is some work that needs doing but most of the physical wiring is still electrically intact and serviceable. (We now have a list of essential work, Changes they want done quickly, & Changes they plan for later next year.)
If you do actually purchase the property, then more often than not you have some of your own personal alterations and/or additions that you want to do anyway, which could have implications on recommendations for what the installation needs to bring is up to current standards.
I would say you need to make a few general assumptions such as:-
The main consumer units and protective devices need upgrading.
Equipotential bonding may need improvement.
The majority of the circuit wiring is probably electrically sound.
A reasonable number of accessories, sockets/switches/pendant lights etc, are probably a bit worn and would benefit from replacement.
Most likely you would need some additional socket positions, or sockets moved and/or sockets converted to double outlets and/or sockets converted to those with USB charge outlets.
Outdoor wiring and accessories will have deteriorated more than internal accessories due to exposure to weather UV light etc..
Basically allow a reasonable sum to undertake a few electrical improvements, and equate this into your offer price..
From the photo is doesn't look like a wreak of a property, but you certainly need to be thinking of four figure sum rather than hundreds to tidy up and check over the electrical work..
What are the first 3 digits of your postcode..?
There may be someone on here who can help?