What are the assets, liabilities, and income accounts for Blake's Builders, and their total values?

*   Bank: $\text{R } 7\,000$
*   Equipment: $\text{R } 30\,000$
*   Vehicles: $\text{R } 55\,000$

$$
\text{Total Assets} = \text{R } 7\,000 + \text{R } 30\,000 + \text{R } 55\,000 = \text{R } 92\,000
$$
The total value of assets is $\boxed{\text{R } 92\,000}$.

*   Loan: $\text{R } 15\,000$

$$
\text{Total Liabilities} = \text{R } 15\,000
$$
The total liabilities are $\boxed{\text{R } 15\,000}$.

*   Income from building services: $\text{R } 45\,000$
*   Rent income: $\text{R } 3\,000$

$$
\text{Total Income} = \text{R } 45\,000 + \text{R } 3\,000 = \text{R } 48\,000
$$
The total income earned is $\boxed{\text{R } 48\,000}$.

*   Advertising: $\text{R } 1\,500$
*   Water and electricity: $\text{R } 2\,000$
*   Material costs: $\text{R } 20\,500$
*   Stationery: $\text{R } 500$
*   Wages: $\text{R } 13\,500$

$$
\text{Total Expenses} = \text{R } 1\,500 + \text{R } 2\,000 + \text{R } 20\,500 + \text{R } 500 + \text{R } 13\,500 = \text{R } 38\,000
$$
The total expenses are $\boxed{\text{R } 38\,000}$.

$$
\text{Profit/Loss} = \text{Total Income} - \text{Total Expenses}
$$

$$
\text{Profit/Loss} = \text{R } 48\,000 - \text{R } 38\,000 = \text{R } 10\,000
$$
Since the result is positive, Blake's Builders made a profit.  
Blake's Builders made a $\boxed{\text{Profit of R } 10\,000}$.