The plaster surface does not appear to be in the worst condition considering- at least what can be seen, which is approximately less than 5% of the surface. But I do see missing plaster on the top step of the pool, generally indicating the plaster is nearing expiration. I would guess that the surface is older than 30 years And is likely due for resurfacing soon As Plaster typically only last 15 to 30 years. A re plastering on a pool like this will run between 9 and 15 k depending on options

The waterline tile appears to be in good condition overall without issue. Even inside the skimmer throat. But the rock border around the pool and some locations will need to be rewarded for safety ($500-1000).

There is some calcium buildup present that can be removed if desired ($550+)

The pool will need to be drained and cleaned. Ideally, we would do that during a period of dry To avoid the potential for the pool to pop out of the ground Due to saturated soil conditions. Alternatively, cycling would be another option. Note that this water should be filled with purified water and not irrigation water to avoid ongoing difficulties with maintenance that relates to keeping the water blue. Drain and clean the pool this should run between 750 to 1500 a sum you do an acid wash to remove organic matter.

Note the calcium hardness level and CYA levels are both low indicating water loss is present.

The Skimmer has organic matter present at its connection points unable to check the lower area. But the skimmer body itself appears to be in stable condition without issue. When The Pool does get started up again, recommend adding a float and float O-ring and likely a new weir door ($200).

Bottom cleaner is obviously older and very likely due for replacement ($650+)

It does appear that there is a pool light present, but cannot be confirmed. Still if there is a new pool pool light installed is 1500.

There is likely a spa light installed and if so, expect the cost of 1500 to replace.

The filter is likely in non-working condition. It will either need service by replacing the filter elements and all tank O-rings $650 Or my opinion, complete replacement of the entire filter is more efficient at approximately $500-$25 depending on options. My personal favorite filter is the TR 140 C Pentair sand filter

This pump is in working condition. It will likely need service to allow to operate correctly, which will include a new pump lid as well as suction and return connections along with a proper three-way valve in front of it ($1000+).

Note that a new Superflo Vs is a great alternative option here ($1200+).

The booster pump does turn on, but it is difficult to determine if it is leaking at this time therefore recommend budgeting for a new booster as these are low-cost pumps approximately $1200 installed or $500 for The pump only.

It does not appear that the Spa blower motor is in working condition. A new unit will run between 300 and 600

The heater appears to be less than 15 years old however it does appear to be in nonworking condition. A replacement heater at 400k BTU would run approximately $4800 installed.

The timer is older and weather beaten. A new breaker + sub panel setup Will likely run approximately $750. Recommend updating for safety as it does not appear the pool lights or spot lights are on a GFCI.

The equipment will need to be updated so recommend updating the Plumbing then with new valving and new connections to the booster and heater (bypass) ($1500).